Federal Emergency Management Agency20090803DIGITAL FLOOD INSURANCE RATE MAP DATABASE, MADISON COUNTY, TENNESSEE AND INCORPORATED AREASFEMA-DFIRM-FinalWashington, DCFederal Emergency Management Agencyhttp://www.fema.gov/mscFederal Emergency Management Agency20090803FEMA CASE 07-04-4864SThe Digital Flood Insurance Rate Map (DFIRM) Database depicts flood risk information and supporting data used to develop the risk data. The primary risk classifications used are the 1-percent-annual-chance flood event, the 0.2-percent-annual- chance flood event, and areas of minimal flood risk. The DFIRM Database is derived from Flood Insurance Studies (FISs), previously published Flood Insurance Rate Maps (FIRMs), flood hazard analyses performed in support of the FISs and FIRMs, and new mapping data, where available. The FISs and FIRMs are published by the Federal Emergency Management Agency (FEMA).
In addition to the preceding, required text, the Abstract should also describe the projection and coordinate system as well as a general statement about horizontal accuracy.The FIRM is the basis for floodplain management, mitigation, and insurance activities for the National Flood Insurance Program (NFIP). Insurance applications include enforcement of the mandatory purchase requirement of the Flood Disaster Protection Act, which "... requires the purchase of flood insurance by property owners who are being assisted by Federal programs or by Federally supervised, regulated or insured agencies or institutions in the acquisition or improvement of land facilities located or to be located in identified areas having special flood hazards, " Section 2 (b) (4) of the Flood Disaster Protection Act of 1973. In addition to the identification of Special Flood Hazard Areas (SFHAs), the risk zones shown on the FIRMs are the basis for the establishment of premium rates for flood coverage offered through the NFIP. The DFIRM Database presents the flood risk information depicted on the FIRM in a digital format suitable for use in electronic mapping applications. The DFIRM database is a subset of the Digital FIS database that serves to archive the information collected during the FIS.20090803FIRM and FIS Effective DateCompleteUnknown-89.368908-88.32316836.02763135.196443ISO 19115 Topic CategoryhydrologyenvironmentinlandWatersstructuretransportationelevationFEMA NFIP Topic CategoryDFIRMFIRMFEMA Flood Hazard ZoneDFIRM DatabaseSpecial Flood Hazard AreaDigital Flood Insurance Rate MapCBRSCoastal Barrier Resources SystemRiverine FloodingCoastal FloodingNFIPBase Flood ElevationSFHAFlood Insurance Rate MapFloodwayNoneREGION 04STATE TNCOUNTY MADISONCOUNTY-FIPS 113COMMUNITY MADISON COUNTY UNINCORPORATED AREASFEMA-CID 47113CCOMMUNITY MADISON COUNTY UNINCORPORATED AREASFEMA-CID 470112COMMUNITY TOWN OF ADAIRFEMA-CID 470234COMMUNITY CITY OF JACKSONFEMA-CID 470113COMMUNITY TOWN OF MEDONFEMA-CID 470403COMMUNITY CITY OF THREE WAYFEMA-CID 470455RestrictedAccess restricted without authorization from the State of Tennessee Department of Finance and Administation GIS Department. Please see point of contact to retrieve data.Federal Emergency Management Agencymailing500 C Street, S.W.WashingtonDistrict of Columbia20472USA1-800-358-9616miphelp@mapmodteam.comFederal Emergency Management Agency2008Flood Insurance Rate Map, MADISON County, Tennessee and Incorporated AreasmapWashington, DCFederal Emergency Management Agencyhttp://www.fema.gov/mscFederal Emergency Management Agency2008Flood Insurance Study, MADISON County, Tennessee and Incorporated AreasdocumentWashington, DCFederal Emergency Management Agencyhttp://www.fema.gov/mscFederal Emergency Management Agency2008Raster FIRM, MADISON County, Tennessee and Incorporated Areasraster digital dataWashington, DCFederal Emergency Management Agencyhttp://www.fema.gov/mscThe DFIRM Database consists of community based vector files and associated attributes produced in conjunction with the hard copy FEMA FIRM. The published effective FIRM and DFIRM maps are issued as the official designation of the SFHAs. As such they are adopted by local communities and form the basis for administration of the NFIP. For these purposes they are authoritative. Provisions exist in the regulations for public review, appeals and corrections of the flood risk information shown to better match real world conditions. As with any engineering analysis of this type, variation from the estimated flood heights and floodplain boundaries is possible. Details of FEMA's requirements for the FISs and flood mapping process that produces these data are available in the Guidelines and Specifications for Flood Hazard Mapping Partners. Attribute accuracy was tested by manual comparison of source graphics with hardcopy plots and a symbolized display on an interactive computer graphic system.
Independent quality control testing of FEMA's DFIRM database was also performed.
To obtain more detailed information in areas where Base Flood Elevations (BFEs) and/or floodways have been determined, users are encouraged to consult the Flood Profiles and Floodway Data and/or Summary of Stillwater Elevations tables contained within the FIS report that accompanies this DFIRM database. Users should be aware that BFEs shown in the S_BFE table represent rounded whole-foot elevations. These BFEs are intended for flood insurance rating purposes only and should not be used as the sole source of flood elevation information. Accordingly, flood elevation data presented in the FIS report must be used in conjunction with the FIRM for purposes of construction and/or floodplain management. The 1-percent-annual-chance water-surface elevations shown in the S_XS table match the regulatory elevations shown in the FIS report.When FEMA revises an FIS, adjacent studies are checked to ensure agreement between flood elevations at the boundaries. Likewise flood elevations at the confluence of streams studied independently are checked to ensure agreement at the confluence. The FIRM and the FIS are developed together and care is taken to ensure that the elevations and other features shown on the flood profiles in the FIS agree with the information shown on the FIRM. However, the elevations as shown on the FIRM are rounded whole-foot elevations. They must be shown so that a profile recreated from the elevations on the FIRM will match the FIS profiles within one half of one foot.Data contained in the DFIRM Database files reflect the content of the source materials. Features may have been eliminated or generalized on the source graphic, due to scale and legibility constraints. With new mapping, FEMA plans to maintain full detail in the spatial data it produces. However, older information is often transferred from existing maps where some generalization has taken place. Flood risk data are developed for communities participating in the NFIP for use in insurance rating and for floodplain management. Flood hazard areas are determined using statistical analyses of records of river flow, storm tides, and rainfall; information obtained through consultation with the communities; floodplain topographic surveys; and hydrological and hydraulic analysis. Both detailed and approximate analyses are employed. Generally, detailed analyses are used to generate flood risk data only for developed or developing areas of communities. For areas where little or no development is expected to occur, FEMA uses approximate analyses to generate flood risk data. Typically, only drainage areas that are greater than one square mile are studied.The DFIRM Database consists of community based vector files and associated attributes produced in conjunction with the hardcopy FEMA FIRM. The published effective FIRM and DFIRM are issued as the official designation of the SFHAs. As such they are adopted by local communities and form the basis for administration of the NFIP. For these purposes they are authoritative. Provisions exist in the regulations for public review, appeals and corrections of the flood risk information shown to better match real world conditions. As with any engineering analysis of this type, variation from the estimated flood heights and floodplain boundaries is possible. Details of FEMA's requirements for the FISs and flood mapping process that produces these data are available in the Guidelines and Specifications for Flood Hazard Mapping Partners. Horizontal accuracy was tested by manual comparison of source graphics with hardcopy plots and a symbolized display on an interactive computer graphic system. Independent quality control testing of FEMA's DFIRM database was also performed.The DFIRM Database consists of community based vector files and associated attributes produced in conjunction with the hardcopy FEMA FIRM. The published effective FIRM and DFIRM maps are issued as the official designation of the SFHAs. As such they are adopted by local communities and form the basis for administration of the NFIP. For these purposes they are authoritative. Provisions exist in the regulations for public review, appeals and corrections of the flood risk information shown to better match real world conditions. As with any engineering analysis of this type, variation from the estimated flood heights and floodplain boundaries is possible. Details of FEMA's requirements for the FISs and flood mapping process that produces these data are available in the Guidelines and Specifications for Flood Hazard Mapping Partners. Vertical accuracy was tested by manual comparison of source graphics with hardcopy plots and a symbolized display on an interactive computer graphic system. Independent quality control testing of FEMA's DFIRM database was also performed.Federal Emergency Management Agency20090803Flood Insurance Study, MADISON County, Tennessee and Incorporated AreasThe sources of authority for this Flood Insurance Study are the National Flood Insurance Act
of 1968 and the Flood Disaster Protection Act of 1973.
This FIS was prepared to include incorporated communities within Madison County into a countywide-format FIS.
Information on the authority and acknowledgements for each jurisdiction included in this countywide FIS, as
compiled from their previously printed FIS reports is shown below. For the City of Jackson, the hydrologic and
and hydraulic anlyses for the FIS report dated January 5, 1983, were prepared by Barge, Waggoner, Sumner and Cannon,
for the Federal Emergency Management Agency (FEMA), under Contract No. H-4811. That work was completed in February
1982. For Madison County and Unincorporated Areas, the hydrologic and hydraulic analyses for the FIS report dated
January 5, 1983, were prepared by Barge, Waggoner, Sumner and Cannon, for the Federal Emergency Management Agency
(FEMA), under Contract No. H-4811. That work was completed in February 1982. The authority and acknowledgements for
the Town of Medon are not included because there was no previously printed FIS for this community. For this countywide
FIS, the hydrologic and hydraulic analyses were prepared for FEMA by the U.S. Army Corps of Emgineers (USACE), Memphis
District, under Inter-Agency Agreement No. EMW-93-E-4115, Project Order No. 4. This work was completed in August 1994.paper2008publication dateSTUDY1Spatial and attribute information, floodplain widths, BFEs, floodplain location, general structures, FIRM Panel Neatlines, cross sectionsUSGS20020101USGS Quad Indexonline20020101publication dateBASE1USGS Quad IndexNOAA, NGS20061129Benchmarksonline20061129publication dateBASE2BenchmarksState of Tennessee Department of Finance and Administration GIS Department20061030Political Boundariesonline20061030publication dateBASE3Political BoundariesState of Tennessee Department of Finance and Administration GIS Department20061030Transportationonline20061030publication dateBASE4TransportationState of Tennessee Department of Finance and Administration GIS Department20061030Hydrologyonline20061030publication dateBASE5HydrologyThe DFIRM Database is compiled in conjunction with the hardcopy FIRM and the final FIS report. The specifics of the hydrologic and hydraulic analyses performed are detailed in the FIS report. The results of these studies are submitted in digital format to FEMA. These data and unrevised data from effective FIRMs are compiled onto the base map used for DFIRM publication and checked for accuracy and compliance with FEMA standards.STUDY1BASE1BASE2BASE3BASE4BASE520090803State Plane Coordinate System 1983410035.2536.4166667-86.00000034.3333331968500.000000.0coordinate pair.304801.304801survey feetNorth American Datum of 1983Geodetic Reference System 806378137298.25North American Vertical Datum of 198810feetAttribute valuesS_BFELocation and attributes for base flood elevations lines shown on DFIRMFEMA Guidelines and Specifications for Flood Hazard Mapping Partners, Appendix L: Guidance for Preparing Draft Digital Data and DFIRM Databases (available at http://www.fema.gov/fhm/dl_cgs.shtm)S_FIRM_PanLocation and attributes for DFIRM hardcopy map panelsFEMA Guidelines and Specifications for Flood Hazard Mapping Partners, Appendix L: Guidance for Preparing Draft Digital Data and DFIRM Databases (available at http://www.fema.gov/fhm/dl_cgs.shtm)S_Fld_Haz_ArLocation and attributes flood insurance risk zones on the DFIRMFEMA Guidelines and Specifications for Flood Hazard Mapping Partners, Appendix L: Guidance for Preparing Draft Digital Data and DFIRM Databases (available at http://www.fema.gov/fhm/dl_cgs.shtm)S_Fld_Haz_LnLocation and attributes for boundaries of flood insurance risk zones on the DFIRMFEMA Guidelines and Specifications for Flood Hazard Mapping Partners, Appendix L: Guidance for Preparing Draft Digital Data and DFIRM Databases (available at http://www.fema.gov/fhm/dl_cgs.shtm)S_Gen_StructLocation and attributes for flood control structures shown on the DFIRMFEMA Guidelines and Specifications for Flood Hazard Mapping Partners, Appendix L: Guidance for Preparing Draft Digital Data and DFIRM Databases (available at http://www.fema.gov/fhm/dl_cgs.shtm)S_Label_LdLocation and attributes for leader lines on transportation and hydrography labels shown on the DFIRMFEMA Guidelines and Specifications for Flood Hazard Mapping Partners, Appendix L: Guidance for Preparing Draft Digital Data and DFIRM Databases (available at http://www.fema.gov/fhm/dl_cgs.shtm)S_Label_PtLocation and attributes for transportation and hydrography labels shown on the DFIRMFEMA Guidelines and Specifications for Flood Hazard Mapping Partners, Appendix L: Guidance for Preparing Draft Digital Data and DFIRM Databases (available at http://www.fema.gov/fhm/dl_cgs.shtm)S_Perm_BmkLocation and attributes for bench marks on the DFIRMFEMA Guidelines and Specifications for Flood Hazard Mapping Partners, Appendix L: Guidance for Preparing Draft Digital Data and DFIRM Databases (available at http://www.fema.gov/fhm/dl_cgs.shtm)S_Pol_ArLocation and attributes for political jurisdictions shown on the DFIRMFEMA Guidelines and Specifications for Flood Hazard Mapping Partners, Appendix L: Guidance for Preparing Draft Digital Data and DFIRM Databases (available at http://www.fema.gov/fhm/dl_cgs.shtm)S_Pol_LnLocation and attributes for political boundaries shown on the DFIRMFEMA Guidelines and Specifications for Flood Hazard Mapping Partners, Appendix L: Guidance for Preparing Draft Digital Data and DFIRM Databases (available at http://www.fema.gov/fhm/dl_cgs.shtm)S_Quad_IndexLocation and attributes for USGS quadrangle maps covering the DFIRM area.FEMA Guidelines and Specifications for Flood Hazard Mapping Partners, Appendix L: Guidance for Preparing Draft Digital Data and DFIRM Databases (available at http://www.fema.gov/fhm/dl_cgs.shtm)S_Trnsport_LnLocation and attributes for roads, railroads and other transportation features shown on the DFIRMFEMA Guidelines and Specifications for Flood Hazard Mapping Partners, Appendix L: Guidance for Preparing Draft Digital Data and DFIRM Databases (available at http://www.fema.gov/fhm/dl_cgs.shtm)S_Wtr_ArLocation and attributes for hydrography features shown on DFIRMFEMA Guidelines and Specifications for Flood Hazard Mapping Partners, Appendix L: Guidance for Preparing Draft Digital Data and DFIRM Databases (available at http://www.fema.gov/fhm/dl_cgs.shtm)S_Wtr_LnLocation and attributes for hydrography features shown on DFIRMFEMA Guidelines and Specifications for Flood Hazard Mapping Partners, Appendix L: Guidance for Preparing Draft Digital Data and DFIRM Databases (available at http://www.fema.gov/fhm/dl_cgs.shtm)S_XSLocation and attributes for cross-section lines in the area covered by the DFIRMFEMA Guidelines and Specifications for Flood Hazard Mapping Partners, Appendix L: Guidance for Preparing Draft Digital Data and DFIRM Databases (available at http://www.fema.gov/fhm/dl_cgs.shtm)The DFIRM Database is made up of several data themes containing both spatial and attribute information. These data together represent the current flood risk for the subject area as identified by FEMA. The attribute tables include SFHA locations, flood zone designations, BFEs, political entities, cross-section locations, FIRM panel information, and other data related to the NFIP.Appendix L of FEMA Guidelines and Specifications for FEMA Flood Hazard Mapping Partners contains a detailed description of each attribute code and a reference to other relevant information.The following tables are included in this data set: L_Comm_Info L_MT1_LOMC L_Pan_Revis L_Stn_Start S_BFE S_FIRM_Pan S_Fld_Haz_Ar S_Fld_Haz_Ln S_Gen_Struct S_Label_Ld S_Label_Pt S_Perm_Bmk S_Pol_Ar S_Pol_Ln S_Quad_Index S_Trnsport_Ln S_Wtr_Ln S_XS Study_InfoFiles with Not Populated (NP) values in attributes: s_transport_ln - label_type field has NP values where attribute information was not providedState of Tennessee Department of Finance and Administration GIS DepartmentDennis PedersonDirector of GIS Servicesmailing and physical address312 8th Ave. North Suite 1600NashvilleTN37243USA615-741-1534dennis.pederson@state.tn.us8am - 4pmContact State of Tennessee Department of Finance and Administration GIS DepartmentSee point of contactARCEhttp://gis.state.tn.us/mapping.htmlESRI Shapefilehttp://www.fema.gov/mscMapInfo Interchange file (MIF)http://www.fema.gov/mscARCECD-ROMISO 9660ESRI ShapefileCD-ROMISO 9660MapInfo Interchange file (MIF)CD-ROMISO 9660Contact Distributor20090803Daryle FontenotWatershed IV AllianceProject Managermailing and physical address6201 Fairview Road Suite 400CharlotteNC28210USA704-643-0108dfontenot@watershedconcepts.comFGDC Content Standards for Digital Geospatial MetadataFGDC-STD-001-1998http://hazards.fema.govhttp://www.epsg.orgFEMA NFIP Metadata Content and Format Standard